osc: api.opensuse.org a lot of https timeouts

Hi,
not sure if this is the right place but:
I am getting a lot of https timeouts using the osc tool for OBS.
Almost every try to checkout something (“osc co …”) ends in a https timeout.
This only happens if I try to connect using KabelDeutschland / Vodafone Cable network,
using my mobile phone with USB-Tethering it works, it is also device independent (notebook does not work as well) and I also tested different routers.

So I am not sure if this is a network problem with my ISP or a server error from opensuse.org.
Tracerooting shows this:

Vodafone Cable:

1 Pyramiden.Obeliske (192.168.0.1) 0.484 ms 1.545 ms 1.731 ms
2 ip53a9b781.static.kabel-deutschland.de (83.169.183.129) 22.862 ms 24.718 ms 24.759 ms
3 ip5886eddf.static.kabel-deutschland.de (88.134.237.223) 24.555 ms 24.615 ms 30.416 ms
4 ip5886eb42.static.kabel-deutschland.de (88.134.235.66) 31.581 ms 35.097 ms *
5 * * *
6 * ip5886ca25.static.kabel-deutschland.de (88.134.202.37) 32.688 ms 34.386 ms
7 rt-decix-2.m-online.net (80.81.193.7) 37.595 ms 28.108 ms 35.105 ms
8 xe-1-2-1.r4.nue1.m-online.net (82.135.16.115) 36.852 ms 37.309 ms 37.373 ms
9 GW-SUSE-NEFkom.241.nefkom.de (212.114.146.241) 134.262 ms 144.647 ms 144.221 ms

Mobile network:

1 192.168.42.129 (192.168.42.129) 1.914 ms 1.965 ms 2.040 ms
2 * * *
3 10.96.82.146 (10.96.82.146) 49.614 ms 49.637 ms 49.656 ms
4 89.204.136.17 (89.204.136.17) 50.910 ms 50.927 ms 50.955 ms
5 89.204.136.2 (89.204.136.2) 52.537 ms 52.559 ms 52.588 ms
6 195.71.234.181 (195.71.234.181) 52.662 ms 21.168 ms 21.326 ms
7 ae8-0.0001.prrx.13.fra.de.net.telefonica.de (62.53.2.59) 33.765 ms ae7-0.0001.prrx.13.fra.de.net.telefonica.de (62.53.2.57) 35.002 ms 35.056 ms
8 rt-decix-1.m-online.net (80.81.192.7) 36.210 ms 37.546 ms 37.573 ms
9 xe-1-2-1.r4.nue1.m-online.net (82.135.16.115) 43.583 ms 42.572 ms 42.515 ms
10 GW-SUSE-NEFkom.241.nefkom.de (212.114.146.241) 146.307 ms 147.723 ms 147.548 ms

Looks like it was caused by missing IPv6 support of OSC or DualStack Lite IPv4 implementation by KabelDeutschland.
Because it seems to be fixed with this: https://github.com/openSUSE/osc/issues/261